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Three cases of noncontrast leptomeningeal carcinomatosis of lung adenocarcinoma with FLAIR high signal on the surface of the brainstem Daisuke Yoshikawa 1 1Department of Radiology Sugita Genpaku Memorial Obama Municipal Hospital Keyword: 癌性髄膜炎 , 肺癌 , MRI pp.291-296
Published Date 2023/3/10
DOI https://doi.org/10.18888/rp.0000002292
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We have experienced three cases of leptomeningeal carcinomatosis diagnosed by CSF cytology, due to the appearance of uncontrasted band-like DWI/FLAIR high signal on the surface of the brainstem during chemotherapy for adenocarcinoma of the lung. Uncontrast brainstem involvement in leptomeningeal carcinomatosis was reported by Crombe et al in 2014, and found in 7.7%(11 of 142 cases)of cancer meningitis in the review. It is note that although leptomeningeal carcinomatosis is important of detection of progressive ventricular enlargement and contrast-enhancing lesions, there are also uncontrast brainstem lesions. Almost all of those primary lesions are lung adenocarcinomas.


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